Sash-lock.



` PATENTE!) PEB. ze, 1907. s. F. BSTBLL, sAsH LocK.

APPLICATION FILED JUNE Z4, 1906.

2 SHEETS-SHEET 1.

lll/I Z7 HIIIIIIIIIIIIIH PATENTED PEBI 26, 1907.

S. F. ESTBLL.

SASH LOCK.

APPLIoATIoN HLED JUNE 24, 1905.

z SHEETS-snm 2.

PATENT ormoni.

SAIVUEL F. ESTELL, OF LOS ANGELES, CALIFORNIA.

SASH-LOCK.

Specification of Letters Patent.

Patented Feb. 26, 1907.

Application filed Jilne 24, 1905. Serial No. 266,803.

To all whom t may concern:

Be it known that I, SAMUEL F. ESTELL, a citizen of the United States, and a resident of Los Angeles, county of Los Angeles, and State of California, have invented certain new and useful Improvements in Sash-Locks, of which the following is a specification, and which are illustrated in the accompanying drawings, forming a part thereof.

The invention relates to sash-locks, and particularly to those of themortised type, in which the locking mechanism is adapted to be let into a recess in the style-face ot' a window-sash, and which may be employed for engaging the window-casing to secure the sash in any desired position within its range of movement.

The obj ect of the invention is to provide a sash-lock of this class which shall present a neat appearance, be of simple and durable construction, and which shall be so e'liicient in operation that it may be employed to secure the sash rigidly in position, although great force may be exerted to move it.

The invention contemplates a pair of rollers adapted to be forced against the windowcasing by means of a cam carried by the mechanism of the lock and so disposed that an effort to move the sash in either direction causes one of the rollers to bear upon the casing with increased force.

The invention consists in the construction and arrangement of parts to be hereinafter described and claimed, and illustrated in the accompanying drawings, in which- Figure 1 is a detail front elevation of the locking mechanism, some of the parts being broken away and others shown in vertical section. Fig. 2 is similar to Fig. 1, but shows a different position of the parts. Fig, 3 is a sectional detail of awindo w-sash, showing the locking mechanism applied thereto in central horizontal section, as indicated. by the line 3 3 of Fig. 1. Fig. 4 is a detail section on the line 4 4 of Fig. 1. Fig. 5 is a vertical cross-section of a detail of a window-sash,

partly broken away, and showing the mech-- anism of the lock and a detail of the windowcasing in side elevation. Fig. 6 is a front elevation of a detail of a window-sash, a detail of the adjacent casing appearing in seetion; and Figs. 7, 8, and 9 are sectional details showing modifications in the construction.

A detail of a window-sash appears at 10, that face thereof having a sliding engagement with the window-casing being designated 11. The mechanism of the lock is preferably housed within the body of the window-sash, a spacious aperture 12 being provided therein for receiving it, and is carried by a suitable framework or casing comprising a face-plate 13, adapted to be set in flush with the sliding or style face 11 of the sash, suitable posts 14 15 rising from the plate 13 into the space 12 and cross members 16 and 17, joining the posts 14 and 15.

A pair of arms 18 19 are pivotally secured to one of the cross members, as 17, and each of the arms is divided at its free end into prongs 20 and 21, which receive rollers 22 23, the axles 24 of which take a bearing at either end in slotted apertures 25 in the prongs. These rollers are adapted to be advanced beyond the face of the sash and to lock the sash in position by frictionally engaging the face of the casing 26, a pair of cams or pressure members 27 28 being provided for advancing the rollers. Each of these cams coperates with but one of the rollers 22 23, and they are preferably united to form a continuous rigid bar 29, firmly secured to the posts 14 15 of the lock-casing.

A rotatable cam 30 is provided for spreading the arms 18 19 to move the rollers over the cams 27 28. It is rigidly mounted upon a shaft 31, journaled in the cross members 16 17 of the frame of the lock and extending through the wall of the sash, an operatinglever 32 being applied to its outer end in the preferred construction.

Operative engagement between 'the arms 18 19 and the face of the cam 30 is established by means of pins 33 34, set in the arms, and a recess 35 is provided in the periphery of the cam for receiving one of these pins, as 33, when the rollers are separated, as in Fig. 2, thereby acting as a catch to prevent the accidental counter rotation of the cam. A spring reacts upon the arms 18 19 to cause the pins to bear upon the periphery of the cam 30. Preferably a coil-spring 36, which connects the arms 18 19, is employed for this purpose and is of sufiicient strength to cause the rotation of the cam and to return the arms to the locked position, Fig. 1, when the pin 33 has been released from engagement with the recess 35 just described.

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The wedge-bar 29 is slotted midway of its ends, as indicated at 37, to provide space for the turning of the cam 30.

In using the device the sash is locked in position when the parts are disposed as shown most clearly in Fig. l and by the full lines in Fig. 6. The rollers 22 23 are then cramped between the face of the casing 26 and the inclined faces of the cams 27 28 and hold the sash firmly in position. Moreover, it will be readily understood that a slight movement of the sash in either direction will advance one of the cams upon the corresponding roller, crowding it outward and causing it to take a firmer hold upon the face of the casing, so that thc greater the force that is exerted to move the sash the more securely will it become clamped in position. As the axles 24 of the rollers 22 23 have a slotted bearing 25 in the prongs of the arms 18 19, they may be advanced by the action of the cams 27 28, as just described, without straining on the arms, and the mechanism of the lock is unaffected by forcibly attempting to open the sash when it is locked. Preferably the face of the casing is shod with a strip of corrugated metal 38 for the purpose of increasing the friction and preventing wear.

The sash may be unlocked so that it may be freely moved in either direction by rotating the operating-lever 32 to the position indicated by dotted lines in Fig. 6. The cam 30 is thereby rotated to separate the arms 18 19 against the effort of the spring 36, and the rollers 22 23 are brought to a position in which the distance between the edge of the casing 26 and the face of the wedge-bar 29 is greater than their diameter. rlhe rollers may then loosely engage either the face of the casing or the face of the cams or wedgebar 29. Owing to the elongated journalbearing 25 of the axles 24 they cannot, however, engage both of these parts at the same time and do not, therefore, afford any resistance to the movement of the sash.

In Fig. 7 is shown a form of construction of the device particularly adapted for use where it is necessary for the sash to slide by other parts of the window-as, for example, upon the ordinary upper sash or upon a sash designed to be moved when opened into a housing in the wall. The shaft 31 extends only to the surface of the sash, where it is journaled in a plate 39, let into the material of the sash, so as to be flush with its side. The operating-lever 32 is then applied to the shaft beneath the plate, and the sash is cut away, as indicated at 40, suliicient to allow the required movement of the lever.

If desired, a soclreted key 41 may be provided for operating the shaft 3l in lieu of the lever 32. It may be attached to the sash or to the casing in any desired manner, as by means of the chain 42, so as to be always conveniently accessible. As shown in Fig. 8,

the end of the shaft 31 projects through a' plate 43, applied to the outer face of the sash and which is provided with a depression 44 for receiving the key.

In the form of construction illustrated in Fig. 9 the cam 30 is mounted on a short shaft 45, journaled in the cross members 16 17 and provided with a recess 46 of any desired shape adapted for receiving the wards of a suitable key, (not shown,) which may be through an aperture 47 in the face of the window-sash. A pair of collars 48 49, encircling the shaft 45, is provided at either side of the cam 30 to--maintain the alinement of the parts.

I claim as my invention` 1. In a sash-lock, in combination, awindow-sash, a pair of pressure-bars secured to the sash and inclined from their adjacent ends away from the style-face of the sash, a pair of friction-rollers arranged to engage one with each pressure-b ar, a spring` drawing the rollers together, and mechanical means acting in opposition to the spring for separating the rollers.

2. In a sash-lock, in combination, a window-sash, a pair of oppositely-inclined pres` sure-bars secured to the sash, a pair of oscillatable arms crossing the pressure-bars, a friction-roller carried by the free end of each arm and each engaging one of the pressurebars, and a cam located between the arms for` swinging them.

3. In a sash-lock, in combination, a window-sash, a pair of pressure-bars secured to the sash and inclined from their adjacent ends away from the style-face of the sash, a pair of friction-rollers arranged to engage one with each pressure-bar, a spring drawing the rollers together, mechanical means acting in opposition to the spring for separating the rollers, and a catch means for locking the rollers in the separated position.

4. In a sash-lock, in combination, a window-sash, a pair of oppositely-inclined pressure-bars secured to the sash, a pair of oscillatable arms crossing the pressure-bars, a frictionwroller carried by the free end of each arm and each engaging one of the pressurebars, and a cam for swinging the arms.

5. In a sash-lock, in combination, a casing adapted. to fit with the style-face of a window-sash and having an aperturedface-plate, a pair of pressure-b ars inclined from their adjacent ends away from the face-plate, a pair of oscillating arms crossing the pressure-bars, a friction-roller carried by the free end of each arm and each engaging one of the pressure-b ars, aspring drawing the arms together, and a spreading cam acting in opposition to the spring.

6. In a sash-lock, in combination, a window-sash, a pair of oppositely-inclined pressure-bars secured to the sash, a pair of oscillatable arms crossing the pressure-bars, a

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friction-roller carried by the free end of each l arm and each engaging one of the pressurebars, and a cam located between the arms for swinging them and adapted to maintain them in the separated position.

7. In a sash-lock, in combination7 a Window-sash, an inclined pressure-bar secured to the sash, a Jfriction-roller running on the pressure-bar, and a catch for locking the roller in 1o an inoperative position.

8. In a sash-lock, in combination, a Winanism for swinging the arm, and a catch for locking the arm in a definite position.

SAMUEL F. ESTELL.

Witnesses:

E. E. POWERS, l C. F. HOLLAND. 

